/*滚动条*/
@mixin scrollBar($bg: #fff, $width: 4px, $thumbBg: #aaa) {
  overflow-x: hidden;
  overflow-y: auto;
  &::-webkit-scrollbar {
    width: $width;
  }

  &::-webkit-scrollbar-track {
    border-radius: 0;
    background: $bg;
  }

  &::-webkit-scrollbar-thumb {
    background-color: $thumbBg;
  }
}
